Plow type of coal mining machine



Sept. 16, 1952 D, PEARSN ETAL 2,610,841

PLow TYPE oF com. MINING MACHINE Filed sept. 25. 195o 2 SHEETS- SHEET 1 Sept. 16, 1952 D. PEARsoN r-:rAL

PLOW TYPE OF COAL vMINING MACHINE 2 SHEETS-SHEET 2 Filed sept.

/NVE/vo/Qs, DAVID PEAESON,

AND Juuus YARMAK, BY

/QTT'Y E 1r N o'cfflooaoloo oul Patented Sept. 16, 1952 PLOW TYPE COAL MINING MACHINE David Pearson and Julius Yarmak, Wakefield,

England, assignors to The Jeffrey Manufacturing Company, a corporation of Ohio Application September 23, 1950, Serial No. 186,362 In Great Britain July 7, V1950 l Claim. l

This invention relates to machines for severing coal and like minerals, the machines being of the kind which are capable of being propelled along a mineral seam face and having at least one shearing wedge or head which can be advanced into the face and is arranged to cut or shear off, by direct thrust, a thick paring of mineral from the face when the machine is propelled therealong.

A main object of the inventionis generally to improve the cutting or shearing efciency of such machines and also to reduce the thrust force necessary for the removal of any given paring.

According to the invention there is provided a machine of the kind specified for severing coal and like minerals. said machine having incorporated therein a vibrator which is capable of vibrating the shearing Vwedge or head whilst the latter is performing its cutting or shearing displacement, the arrangement of said vibrator being such that vibrations are set up thereby which are transverse to the direction of shearing or cutting motion and in a plane containing the cutting or shearing edge of said wedge or head.

In order that the invention may be clearly understood and readily carried into eiiect one embodiment thereof will now be described in detail with reference to the accompanying drawings wherein:

Fig. 1 is a sectional side elevation taken on the line I-I of Fig. 2 and showing a vibrator mounted in the manner of the invention inside a shearing wedge or head of a coal severing machine,

Fig. 2 is a cross-section on the line II-II of Fig. 1,

Fig. 3 is a plan view, partly broken away and to a reduced scale, showing a coal severing machine according to the invention in the cutting position against a coal face,

Fig. 4 is a side elevational view of the machine as shown in Fig. 3, and

Figs. 5 and 6' are detail views showing respectively two different means for connecting a shearing wedge or head to the severing machine body.

Referring now to the drawings and in particular to Figs. 1 and 2, a vibrator I having strikers 2 and 3, is mounted inside a shearing wedge i which forms part of a coal'severing machine or plough. The shearing wedge i is provided with a shearing blade 5 having a cutting or shearing edge 5a (see Fig. 1) and made up of short pieces each screwed in position on the wedge 4 by screws 6. The strikers 2 and 3 are adapted to perform quick reciprocating movement, as shown by arrows 1, 8, 9 and l0 respectively, under the in- -iiuence of hydraulic iiuid under pressure supplied to the vibrator through inlet pipe I I and I2 so as to strike upon ribs I3 and Ill faced respectively with rubber or spring elasticcovers I3a, I4a and formed integrally with the wedge 4.. In this way, force impulses are imposed causing vibration of the whole shearing wedge Il and directed along the shearing blade 5 as shown by the arrows I5 and I6 (see Fig. 1). Worked out hydraulic fluid is delivered from the vibrator through outlet pipe I'l and I8.

The shearingwedge 4 is provided witha detachably connected vertical wall I9 (Fig. 2) to assist-in guiding and loading the coal upon a conveyor 26a (Fig. 3). The'` manner of construction and operation of one vibrator which may be employed is disclosed` in greater detail in our ccpending application Serial No. 186,361, filed September 23, 1950 for a High Speed Multiple Cylinder Hydraulic Vibrator.

The shearing wedge or head i may be connected to the machine or plough body 26 (Figs. 3 and 4) by means of fiat springs 2I (Figs. 1, 2 and 5) fixed securely by their forward ends to the back plate 4a of shearing wedge el by means of brackets 22 and screws 23. The back ends of the springs 2l are xed in a similar manner by means of brackets 24 (Fig. 5) to the coal plough body 2U. The described connection permits transmission cil the thrusting force shown by arrow 25 in Figs. 3 to 6 and permits simultaneously vibration of the shearing head ll in a plane transverse to the direction of thrusting force and which contains the cutting or shearing edge 5a 0f the blade 5. The direction of vibration of the 1 blade in the example illustrated is indicated by arrows 26 and 21 in Figs. 1, 5 and 6 and the extent thereof by dotted lines 28 and 29 in Figs. 5 and 6.

An alternative means of flexibly connecting the shearing head 4 to the plough body 20 is shown in Fig. 6. This connection comprises links 30 and 3| pivotally mounted on the shearing head 4 by pins 32 and 33 and on the coal plough body by pins 34 and 35.

A coal severing machine or plough as shown in Figs. 3 and 4 may be single or double-headed, the heads in the latter case being used alternatively according to the direction of travel of the plough.

Inside the plough body 20 is built an electric or compressed air motor 36 driving, by means of a coupling 31, a hydraulic pump 38 immersed in hydraulic oil in container lill. From pump 38 oil under pressure is supplied through the flexible pipe I2 and pipe Il to the vibrator l and worked out oil is discharged through the pipe I1 and the outlet pipe or hose I8 back into the container 40.

The coal severing machine or plough in the particular example illustrated is adapted for haulage ropepropulsion in which av steelwire rope 4L passes around a pulley'42 mounted, in a projecting bracket 43 of the machine, on a pivot pin 44. travel along the coal face 45 slides between the coal face and the face conveyormand' picks up and loads, by means of, the slope surface 46,

broken and severed coal, this; coal being,v liftedl over the loading edge 41 of the face conveyorby means of the aforesaid slope surface. A forward ramp 49 treats in thesame way'anyfsmallcoal which would otherwise obstructv the rope:

pulley 42.

As will be readily appreciated other well known methods of p ropulsiorlmay alternatively be employred for displacingl the, severing' machine or plough along the coal;face. A

I t has been lfound inl P llticethat; by impartingvibrations in the manner'described*v to the shearing -head it is possibleconsiderably'to re'- duce the thrust florefnecessary'to cut-ofi a given paring andthereby -the overall eiiiciencypi' the machine is; materially increased..

It will of course; also be appreciated that, whilst `a machine for severing-coal has been deiscribed, the invention is equally applicable to machines employed' for `severing any other similarmineral which` it1isA desired to; remove in parings from a seam-face., Similarlyy theinven'- tionis notlmiteditc the use of hydraulic., vibrators andi any other form of7 vibrator. may alternativelybe Iemployed ,tot produce the required action forV causing: longitudinal -vibration ,of A the shearing Wedge or head.,4

The severing machine during its.,

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as dened by the claim hereto appended, and applicants therefore wish not to be restricted to the precise construction herendsclosed.A v

Havingfthus described' and shown:` an embodiment of the invention, what it is desired to secure by Letters Patent of the United States is:

A shearing type coal mining machine includingalicdy; meansresiliently mounting a shearing head on saidbody, said shearing head having,a.shearing .jblade operable to shear coal as saidlmacliinelised'along a coal face, and vibratory mechanism contained within said head and operableto vibratesaid head.

DAVID PEARSON. J ULIUS YARMAK.

The followingV references,. are of record in .the file; of thisfv patent:

UNITED STATES*` BA'IEN'IS.

Humbert Name; Date:

511:8,69 Warner: Jan; A:M1894: 651,758 Ochtinsky ...Iune l2, ,1900

1563153' Brackettetla'l: Nev.v 24, 1925 2,228,445- DeVlbissr Jan. 14,v 1941 2,3082517' Knnertlir Jan. 19, 1943 FOREIGN f PATENTS f Number Country, Date 3lSVQ51'7 Germany Nov. 4, 1921 365,168, Germany YDec. .9, f1922 90159-15.v Erance Aug 9.1945 

